The SI Standard of Length Is Based On

question 6

Multiple Choice

The SI standard of length is based on:

• A)the distance from the north pole to the equator along a meridian passing through Paris
• B)wavelength of light emitted by Hg¹⁹⁸
• C)wavelength of light emitted by Kr⁸⁶
• D)a precision meter stick in Paris
• E)the speed of light

---

Definitions:

Healthier Environments

Conditions or settings that promote well-being and prevent disease among the population by managing environmental risk factors.

Paul Ehrlich

A scientist known for his work in the fields of immunology and population control.

Julian Simon

An American economist known for his work on population, natural resources, and immigration, emphasizing that human ingenuity can solve many perceived problems.

Resource Prices

The costs associated with the factors of production, including land, labor, and capital.